Chuck.



DAVID A. MOORE, OF KALAMAZOO, MICHIGAN.

CHUCK.

Specification of Letters Patent.

Patented April 28, 1908.

Application filed December 6, 1906. fierial No. 846.656.

To all whom it may concern:

Be it known that 1, DAVID A. hlOORE, a citizen of the United States, residing at the city of Kalamazoo, county of Kalamazoo,

5 State of Michigan, have invented certain new and useful Improvements in Chucks, of which the following is a specification.

This invention relates to improvements in chucks.

The objects of this invention are: First: to provide an improved chuck which is .adapted to receive and roperly hold drills having flat shanks or diills having round shanks. Second: to provide an improved chuck which is very quickly and easily adjusted to receive and secure a drill, and one which is very convenient to adjust.

Further objects, and objects relating to structural details, will definitely appear in the detailed description to follow.

I accomplish the objects of my invention by'the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which,

Figure 1 is a view partiallyin longitudinal section taken on a line corresponding to line l1 Fig. 2. F'g. 2 is a view'partially in longitudinalsection taken on a line corresponding to line 2--2 Fig. 1. Fig. 3 is a cross section taken on a line corresponding to line 33 Fi 2. Fig; 4. is a plan of a double ended at drill for which my. improved chuck is adapted.

In the drawing the sectional views are +10 taken looking in the direction of the little arrows at ends of the section lines, and

similar reference characters refer to similar parts throughout the several views.

Referring to the drawing, 1 is the body of the chuck and is provided with a suitable spindle. at its inner end, preferably being formed integral therewith. At the outer end of the body 1 is a double conical enlargement 2, that is, it has cone shaped ends. The

to outer end of body 1 is threaded to receive the rin -like clamping member 3, which is adapted to fit the outer end of the enlargement 2. The ring-like clamping member 5 is loosel sleeved on the body and is adapted to. fit t e innerend ofthe enlargement 2. This ring is adjusted and held in position by drically central portion 10.

fiat shanks of varying widths, the inner pcthe nut 6, threaded upon the inner end. of the body.

The body is provided with a slot-like socket at its outer end, the socket extending entirely across the same. Loosely arranged into this socket are clamping jaws 4, having tapered ends adapted to be engaged by the clam ing members 3 and 5, whereby they are c amped inwardly upon the edges of the drill as 9. The shank of the drill 9 is fiat and designed to fit loosely in the socket.

To hold the jaws normally out and prevent their falling into the'socket I preferably provide a spring 8. This spring is preferably formed of spring wire bent into ahalf arch with its ends inserted through jaws, as clearly appears in Fig. 3.

To adapt the chuck for drills having round shanks the socket is provided with a cylin- This does not in any way interfere with the use of the chuck as a chuck for drills having flat shanks, and at the same time provides a satisfactory chuck for holding drills having round shanks. so

A set screw 7 is provided for securing the drills'having the round shanks in the chuck. This set screw is located between the jaw clamping members 3 and 5, as clearly appears from the drawings. The bottom of the cylindrical portion of the socketis preferably conical, so that it serves to center the inner end of the drill shank when the double ended flat drill 13 is placed in the chuck.

My improved chuck is particularly designed by me for usein connection wi thmy improved drills 9 and 13, although it is, of course, adapted for use in connection with any drill, having a flat shank or a round shank, as stated. My improved chuck is also very economical to produce, as the parts are easily produced and very easily assembled It isv evident that the same is very easy to adjust, as the adjusting ring is at the rear of the body where it is within the convenient reach of the operator. It is also capable of very rapid adjustment, as but slight movement of the nut 6 is necessary in order to releasethejaws. The chuck is adapted to receive drills having sition of the jaws of the structure. illustrated being indicated by dotted lines in Fig. 1. Another advantage is that b this ,arran ement there is no liability o the arts ecoming stuck or wedged so but't at they 1 10 ma" be readily freed or released. l

have illustrated and-described my imsocket; a-clamping ring adapted to fit the threaded upon said body; clampmg jaws proved chuck in detail in' the form referred y me on account of structural simp icity and economy. I am, however, aware that it is capable of considerable variation in structural detail without departing from my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a chuck, the combination of a cylindrical body provided with a double conical enlargement, said body having a slot-like outer end of said conical enlargement; an adjustable clamping ring-adapted to fit the inner end of said conical enlargement sleeved upon said body;a,clampin nut for adjusta ly securing, said adjustab e' clamping ring threaded upon said body; clamping jaws having ta ered ends -ada ted to be engaged by said cFampin rings oosely arranged in said slot-like soc et; and a spring. arranged to hold said jaws normally outward for the purpose specified;

.2. In a chuck, the combination of a cylindrical body provided with a double conical enlargement, said body having a slot-like socket provided with a cylindrical central portion; a clam ing ring adapted to fit the outer end of sai conical enlargement; an adjustable clamping ring adapted to fit the inner end of said conical enlargement sleeved upon said body; a clampin nut for adjusta ly securing said adjustabde clampingring having ta ered ends ada ted to be engaged by said c amping rings oosely arranged in said slot-like socket; and a set screw arranged between said clamping rings, for the purpose specified.

3. In a chu'bk, the combination of a cylindrical body provided witha double conical enlargement, said body having a slot-like socket; a clamping ring adapted to fit the outer end of said conical enlargement; an adjustable clamping ring adapted to fit the inner end of said conical enlargement sleeved u on said body; a clampin nut for adjusta ly securing said adjustab e clamping ring threaded upon said body; and clamping jaws havingta ered ends ada ted to be engaged by said. cl ampin rin s l bosely'arranged in paiill slot-like soc et, -or the purpose speci- 4. In a chuck, the combination of a body I having a slot-like socket adapted to receive a Hat shank; an inwardly facing clamping member arranged at the outer end of said body; an outwardly facing adjustable clamping member sleeved upon said body; a clamping nut for securing said adjustable clamp- ,ing member threaded upon said body; clamping jaws having beveled ends adapted to be engaged by said clam ing members loosely arranged in said slot-li e socket, said. clamping jaws being adapted to center the drill 111;

the chuck; and a spring arranged to. hold said jaws normally outward, for the purpose specified. j i

5. In a chuck, the combination of a body having a slot-like socket adapted to receive a fiat shank; an inwardly facing clampin member arranged at the outer end of sai body; an outwardly facing adjustable clamping member sleeved upon said body; a clamping nut threaded upon said body; clamping jaws adapted to be engaged by said clam mg members loosely arranged in said slot-1i e socket, said clamping jaws being adapted to center the drill in the chuck, for the purpose specified.

6. In a chuck, the combination of a body having a slot-like socket therein adapted to receive a flat shank; an inwardly facing clamping member arranged u on the outer end of said body; an outwar ly facing adjustable clamping member arranged upon said body; securing means for said adjustable clamping member; and clamping jaws adapt.

ed to be engaged by said clamping members loosely arranged in said slot-like socket, said clamping jaws being adapted to center the drill in the chuck, for the urposes ecified. 7. In a chuck, the combination 0 a body rovided with a conical enlargement, said 'ody having a slot-like socket therein adapted to receive a fiat shank; a clamping ring adapted to fit said conical enlargement sleeved upon said body; a clamping nut for adjustably securing said clamping ring threaded upon said body; and clamping jaws adapted to be en aged by said clampin ring arranged in'sair slot-like socket, sai clam ing jaws being adapted to center the drill m the chuck, for the purpose s ecified.

8. ,In a. chuck, the combination 0 a body having a slot-like socket therein adapted to receive a fiat shank, said socket being provided with a cylindrical central portion adapted to receive a round shank; clamping jaws arranged in said slot-like socket; adjusting means therefor; and a set screw arranged through said body, ada ted to engage a round shank arranged in t e cylindrical portion of said socket, for the purpose speci- DAVID A. MOORE. I a. 3.]

Witnesses:

OTIS A. EARL, LULU GREENFIE D. 

